<template>
  <!-- 商品分类导航 -->
  <div class="type-nav">
    <div class="container">
      <div @mouseenter="isNavShowT" @mouseleave="isNavShowF">
        <h2 class="all">全部商品分类</h2>
        <transition name="sort">
          <div class="sort" v-show="navShow">
            <div class="all-sort-list2">
              <div class="item"
                   v-for="(category,index) in newTypeList"
                   :key="category.categoryId"
                   :class="current===index?'active':''"
                   @mouseenter="throttleEnter(index)"
                   @mouseleave="current = -1"
                   @click="goToSearch"
              >
                <h3>
                  <a
                      href="javascript:;"
                      :data-category1Id="category.categoryId"
                      :data-categoryName="category.categoryName"
                  >{{category.categoryName}}</a>
                </h3>
                <div class="item-list clearfix" >
                  <div class="subitem" v-for="child in category.categoryChild" :key="child.categoryId">
                    <dl class="fore">
                      <dt>
                        <a
                            href="javascript:;"
                            :data-category2Id="category.categoryId"
                            :data-categoryName="category.categoryName"
                        >{{child.categoryName}}</a>
                      </dt>
                      <dd>
                        <em v-for="item in child.categoryChild" :key="item.categoryId">
                          <a
                              href="javascript:;"
                              :data-category3Id="category.categoryId"
                              :data-categoryName="category.categoryName"
                          >{{item.categoryName}}</a>
                        </em>
                      </dd>
                    </dl>
                  </div>
                </div>
              </div >
            </div>
          </div>
        </transition>
      </div>
      <nav class="nav">
        <router-link to="">服装城</router-link>
        <router-link to="">美妆馆</router-link>
        <router-link to="">尚品汇超市</router-link>
        <router-link to="">全球购</router-link>
        <router-link to="">闪购</router-link>
        <router-link to="">团购</router-link>
        <router-link to="">有趣</router-link>
        <router-link to="">秒杀</router-link>
      </nav>
    </div>
  </div>
</template>

<script>
import {mapState,mapGetters} from "vuex"
import _ from "lodash"
export default {
  name: "NavType",
  data(){
    return{
      current:-1,
      navShow:false
    }
  },
  mounted() {
    this.throttleEnter = _.throttle(this.mouseenter, 80, {
      trailing: false,
      leading: true,
    });
    this.navShowFix()
  },
  methods:{

    mouseenter(index){
      this.current = index
    },
    //设置路由跳转到search
    goToSearch(e){
      if (e.target.nodeName === 'A'){
        //采用query传参的方式来
        const query = {}
        // console.log(e.target.dataset)
        const {category1id,category2id,category3id,categoryname} =
        e.target.dataset;
        //判断点击的标签名
        query.categoryName = categoryname
        //判断id
        if (category1id){
          query.category1Id = category1id
        }else if (category2id){
          query.category2Id = category2id
        }else if (category3id){
          query.category3Id = category3id
        }
        const params = this.$route.params
        this.$router.push({
          name:'search',
          query,
          params
        })
        this.navShow = false
      }
    },
  //  控制下方列表显示隐藏
    isNavShowT(){
      if (this.$route.path==='/home')return
      this.navShow=true
    },
    isNavShowF(){
      if (this.$route.path==='/home')return
      this.navShow=false
    },
    navShowFix(){
      if (this.$route.path==='/home'){
        this.navShow = true
      }
    }

  },
  computed:{
    ...mapState('home',["typeList"]),
    ...mapGetters('home',["newTypeList"])
  }


}
</script>

<style lang="less" scoped>
.type-nav {
  border-bottom: 2px solid #e1251b;

  .container {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    position: relative;

    .all {
      width: 210px;
      height: 45px;
      background-color: #e1251b;
      line-height: 45px;
      text-align: center;
      color: #fff;
      font-size: 14px;
      font-weight: bold;
    }

    .nav {
      a {
        height: 45px;
        margin: 0 22px;
        line-height: 45px;
        font-size: 16px;
        color: #333;
      }
    }
    .sort-enter,
    .sort-leave-to{
      opacity: 0;
    }
    .sort-enter-active,
    .sort-leave-active{
      transition: all 0.2s linear;
    }
    .sort {
      position: absolute;
      left: 0;
      top: 45px;
      width: 210px;
      height: 461px;
      background: #fafafa;
      z-index: 999;

      .all-sort-list2 {
        .item {
          h3 {
            line-height: 30px;
            font-size: 14px;
            font-weight: 400;
            overflow: hidden;
            padding: 0 20px;
            margin: 0;

            a {
              color: #333;
            }
          }

          .item-list {
            display: none;
            position: absolute;
            width: 734px;
            min-height: 460px;
            background: #f7f7f7;
            left: 210px;
            border: 1px solid #ddd;
            top: 0;
            z-index: 9999 !important;

            .subitem {
              float: left;
              width: 650px;
              padding: 0 4px 0 8px;

              dl {
                border-top: 1px solid #eee;
                padding: 6px 0;
                overflow: hidden;
                zoom: 1;

                &.fore {
                  border-top: 0;
                }

                dt {
                  float: left;
                  width: 54px;
                  line-height: 22px;
                  text-align: right;
                  padding: 3px 6px 0 0;
                  font-weight: 700;
                }

                dd {
                  float: left;
                  width: 415px;
                  padding: 3px 0 0;
                  overflow: hidden;

                  em {
                    float: left;
                    height: 14px;
                    line-height: 14px;
                    padding: 0 8px;
                    margin-top: 5px;
                    border-left: 1px solid #ccc;
                  }
                }
              }
            }
          }

          &.active {
            background-color: #df3033;
            .item-list {
              display: block;
            }
          }
        }
      }
    }
  }
}
</style>